fix(kingbase): honor connection identifier quotes in exports

crates/dbx-core/tests/live_sqlserver_completion.rs

@@ -1201,6 +1201,7 @@ async fn live_sqlserver_query_result_export_streams_cte_query_to_csv() {
         export_table_name: None,
         export_column_types: None,
         column_comments: None,
+        identifier_quote: None,
         numeric_column_right_align: false,
     };
     let done_seen = AtomicBool::new(false);